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A174200
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The sequence of numbers which, when entered on a standard telephone numeric keypad, produce the letters a thru z. Letters are accessed by one or more presses of a single key.
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0
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2, 22, 222, 3, 33, 333, 4, 44, 444, 5, 55, 555, 6, 66, 666, 7, 77, 777, 7777, 8, 88, 888, 9, 99, 999, 9999
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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Method of entry commonly used on cellular telephones for text-messaging. Not the sequence of a-z used in telephone numbers.
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LINKS
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EXAMPLE
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To generate the letter 'a', type '2', to generate 'b', type '2' twice, or '22'.
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CROSSREFS
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KEYWORD
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nonn,fini,full
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AUTHOR
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Adam Risi (ajrisi(AT)gmail.com), Mar 11 2010
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EXTENSIONS
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STATUS
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approved
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